Vehicle-tire.



W. F., STEWART. VEHICLE TIRE.

APPucmoH FILED JULY 3.191'5.

Patented F61). 29,1916.

- LIE f;

- wi hwaow I Be it known that 1, WILLIAM g a no? u ri i cl'ir iii ii lolio WILLIAM r. s'rnwaate," or EEKEIQ', rumors.

VEHICllE-TIEE.

Specification 01 To all whom it may concern:

F. STEWART, a citizen of the United States, residing at Pekin, in thecounty of Tazewell and State oflllinois, have invented new and usefulImprovements in Vehicle-Tires, of Which the following is aspecification, 1 r

This invention relates to certain novel and useful improvements inVehicle tires and has particular application to an inner tube for tiresof the inner tube type.

In carrying out the present invention; it is mv purpose to provide aninner tube which will be formed of spring" steelor analogous materialand which may be quickly and nonveniently placed in the outer casing orshoe of the tire, thereby preventing blow-outs and. punctures andenabling the maximum Wear to be obtained from the casing.

With the above and other objects in View. the invention consists, in'the construction, combination and arrangement of parts hereinafter setforthin and falling Within the scope of the claim.

In the accompanying dratvingr Figure l is a fragmentary longitudinalsectional view through a vehicle tire equipped with an inpresentinvention.

ner tube constructed in accordance with the Fig. 2 is an enlarged crosssectional view through the inner tube. Fin. 3 is aview in sideeievationof the same. Fig. 4 is a crosssectional Vl8W through the inner tube atapoint remote from the valve.

Referring'now to the drawing in detail, 1 designates the folly of'avehicle Wheel, 2 the outer casing" or shoe 01:" the tire and 3 myimproved inner tube disposed Within the casing or shoe 2. In-accordanceWith-my present invention, this inner tube 3 is formed of spring steeland is provided with avalve opening 4: Within which is secured valve 5whereby air ma beforced into the ubeand held therein. The ends of themetal inner tube are welded toQe-ther preferably electrica1ly.'- A'spreviously stated, thisinner tube I isforrned of spring steel oranalogous tough material and When filled with air-acts as an air cushionso that the transmission of shocks and jars :to the body ot the vehiclewill be minimized; It ivill. be noted that'this metal Letters Patent.

Patented Feb. 289. ffiifi.

- Appiicationfiled July 3, 1915. Serial No. 37,919.

the rubber casing surrounding such tube may be Worn to shreds Withoutaffecting the tube, thereby enabling the maximum wear to be obtainedfrom the casing. After the easing has been orn out such casing may bethrown away and the tube inserted in a new casing.- This metal innertube possesses all of the resilient qualities of the rubber inner tubeand is proof against blow-outs and punctures as apparent.

The inner circumference of the inner tube '3 is formed with a circulargroove 6, as shown in l i, and this groove 6 starts at apoint spaced)art from the valve 5 at one side of such valve and terminates at apoint spaced apart from the valve at the opposite side of the valve. henthe inner tube is inflated, that portion of the tube formed, with thea'roove 6 tends to fill out, under the action of the air, and soincreases the resili ency of the metal inner tube. At opposite sidesoi-the groove 6. the Wall of the tube 3 is formedwith circular grooves 6,6, as shown in Fig. 2 and those portions of "thetuhe formed With thegrooves 6 tend to fill'out under air pressure to bind against the beadsof the outer casing or shoe.

1. claim: 1

An inner tube for vehicle tires formed of spring steel circular incrossisection and having the meeting ends thereof secfi e dtogethee andformed \vith'n valve opening andhaving the innerperiphery thereof formedWith a groove starting at apoint at one side of the "alve of the tubeand terminating at a point at the opposite side of the valve of the tubeand with rooves at the opposite sides of the first-mentioned groove. allof said grooves being adapted to fill out under the action of air in thecube to increase the resiliencv of the tube and cause the latter to bindagainst the beads of the outer casing of the tire.

In testimony whereof I affix my signature in presence of two witnesse ifWILLIAM STEWART.

Witnesses:

H. M. Ennjmonna, JAMEs J. CROSBY.

